Mold



- R. P. ZENTS MOLD.

APPLICATION HLED APR. 27. 1920.

1,391,988. 7 d ep 27, 1921..

NT OFFICE."

'RAY MON D P. 'ZENTS, OF OMAHA, NEBRASKA.

MOLD.

To all whom it may concern:

Be it known that I, RAYMoN P. ZEN'rs, citizen of the United States,residin at Omaha, in the county vof Douglas and tate of Nebraska,'haveinvented certain new and useful Improvements in Molds, of which thefollowing is a specification, reference being had therein to theaccompanying drawing.

My invention relates to molds and'more particularly to a mold forforming openings in concrete floors to receive pipes for heating,plumbing, gas, wiring, etc.

The principal object of the inventionis the construction of the mold insuch a manner that may be readily fattached in position for use andwhich may be easily removed after the concrete has set and used over anumber of times.

Another object resides in theprovisioii of a cover adapted to be rotatedto loosen the jmold from the concrete so that it-may be re- 'moved.

A further object consists in the provision ,ofmeans carried *bythe moldfor attaching to the floor framework;

With these and other objects in view, my invention consists in the noveldetails of construction and arrangement of parts: which will be moreclearly understood from the following specification and drawings, in

V Figure 1 is a vertical section; Fig. 2 is a top plan of the sectionalcas- 1 1w- I ig. 3 is a top plan ofthe cover, and v Fig. 4., a verticalsection through the cover. y

In ,the-drawing ,.1 indicates the floor framework upon whichthe concreteis to be poured for forming the floor. My mold is adapted to rest uponthis framework 1 and consists of the sections 2 and v The ends of thesection 3 are curved inwardly as indicated at 4: so that whenthesections are brought together the verticaledges of the section 3 Wlllbe overlapped by the vertical edges or the section 2. I I

At spaced points, the upper edgeof the section v2 is pressed outwardlyto form projections 5 for a purpose to be later described. The section 3is also provided witha pressed out projection 6 adapted to cooperatewith the projections 5 ofth-e section 2 A cross-bar 7 is provided forconnecting th lowerons is of the Se t ns. 2 andfi fifth Specification ofLetters Patent.

' Application filed April 27, 1920. Serial No.

tions 13 will I 11 and is Patented Sept. 27, 1921. 377,036.

with a downwardly extending flange. 12-

whichis adapted to extend around theupper end of. the sleeve or casing.This cover 11 is of. such a shape as to provide the curved portions 13and straight portions 14.-.,The

distance from the center point of the; cover to the straight portion 14is less than the distance from the center of the cover to the curvedportion 13. a a

When in position the cover normally rests in such be over theprojections 5 and 6 formed on the sections of the casing or sleeve. Whenthe cover is rotated the straight portions 141 will engage theprojections 5 and 6 and thereby force the upper portions of the sectionsof the sleeve or casinginwardly to reduce the upper end of said sleeveor casing.

A square ofi'set 15 is struck from the cover provided with a centralopening adapted to be in alinement with the central opening of the,crossbar 7 i The cover 11 is provided with openings 16' through'whichnails may be placedfor holding the upper ends of clearly shown in Fig. lof the drawings, the

sleeve or casing, when the sections are as tend through the opening 19and hold said washer 20 inposition. An enlarged head 22 is formed on theupper end of the threaded bolt 17 and when the in position said Thecrossbar 7 ,is alsoprovided diameter of the a a position that the curvedponthe sections 2 and 3 extended. As

enlarged head will be received on the top of the square ofiset 15.

As stated in the objectsof my invention, my mold is primarily intendedfor forming openings in concrete floors and said openings are intendedto have pipes extend therethrough. \Vhen in use my mold will be set uponthe floor framework and the threaded bolt 17 will extend through thecover 11 and cross-bar 7. The pointed end 18 may be driven into theframework which is preferably of wood, and then by rotating the bolt thethreads will engage the framework and securely hold the mold in positionthereon. As stated, the upper end of the mold is of greater diameterthan the lower end, and nails maybe placed through the openings 16 inthe cover 11 to hold the upper end of the sleeve or casing extended. Theconcrete is poured upon the framework 1 around the mold and when theconcrete is set sufficiently the mold is to be removed. The first stepin removing the mold is to rotatethe cover 11 so that the straightportions 14: will engage the projections 5 and 6. This operation willreduce the upper diameter of the sleeve or casing and draw said sleeveor casing from contact with the concrete. Then by rotating the bolt 17the mold will be raised from the framework and can easily be removed. Itwill be noted that when the bolt is rotated, the cotter-pin 21, engagingthe under side of the washer 20, will raise the cross-bar 7 which inturn will raise the entire mold. The cover 11 may be rotated by engagingthe square offset 15. While I have described my mold in use inconnection with a wood framework, it will be understood that it could beused equally as well in connection with a metal framework. When usedwith a metal framework, the bolt will receive a nut carried by theframework.

From the construction described it will be seen that my mold may be usedover a number of times and is not mutilated when withdrawing'from theconcrete.

Having fully described my invention, what I claim as'new' and desire tosecure by Letters Patent of the United States, is:

1. A mold, comprising a sleeve and a cap rotatably mounted on one end ofthe sleeve for reducing the diameter thereof.

2. A mold comprising a sectional sleeve, means connecting the sectionsadjacent one end, and a cap rotatably mounted on the opposit'e end forreducing the diameter of the sleeve.

3. A mold comprising a sleeve, a cap rotatablymount-ed on one end of thesleeve for reducing the diameter thereof and means adapted to passthrough the cap and engage the inner face of the sleeve for holding itexpanded. r

4. A'mo'ld comprising a sleeve, a cap rotatably mounted on one end ofthe sleeve for reducing the diameter thereof, and detachable meansadapted to pass through the cap and engage the inner face of the sleevefor holding it expanded.

5. A mold comprising a sleeve, a cap rotatably mounted on the sleeve forreducing the diameter thereof, and an offset extending from the outerface of the cap adapted to be engaged for rotating the same.

6. A mold comprising a sleeve, a cover rotatably mounted on the top ofthe sleeve for reducing the diameter thereof, a cross-bar secured in thesleeve adjacent the lower end, and a threaded bolt extending through thecover and cross-bar.

7. A mold comp-rising a sleeve, a cover rotatably mounted on the top ofthe sleeve for reducing the diameter thereof, an offset formed on thetop of the cover, a cross-bar secured in the sleeve adjacent the lowerend, and a threaded bolt extending through the offset on the cover andcross-bar. I

8. A mold comprising a sleeve, outwardly extending and circumferentiallyspaced projections formed on the upper end of the sleeve, a coverrotatably mounted on the upper end of the sleeve and adapted to engagethe projections for reducing the diameter of the sleeve, and a threadedbolt carried by the cover and extending through the sleeve. I, i

v 9. A mold comprising a sleeve, outwardly extending andcircumferentially spaced projections formed on the upper end of thesleeve, a cover rotatably mounted onv the top of the sleeve, adownwardly extending flange formed on the cover, the diameter of saidflange being reduced at points to engage the projections for reducingthe diameter of the sleeve, and a threaded bolt carried by the cover andextending through the sleeve.

10. A mold comprising a sleeve formed in sections with their verticaledges over lapping, outwardly extending projections formed on the upperedge of each section, a cover rotatably mounted on the tops of thesections, a cross-bar connecting the sections adjacent their lower ends,and a threaded bolt extending through the cover and cross-bar.

11. A mold. comprising a sectional sleeve, a cross-bar connecting thesections adja-, cent their lower ends, a cover rotatably mounted on thetop of the sleeve for reducing the diameter thereof, a threaded boltextending through the cover and cross-bar, a washer surrounding the boltand engaging the under side of the cross-bar, and a pin extendingthrough the threaded bolt and engaging the under face of the washer.

12. A mold comprising a tapered sleeve, a cross-bar secured in thesleeve, a cover r0 V tatably mounted on the upper end of the 13.0

sleeve for reducing the diameter of the sleeve, and a threaded boltextending through the cover and cross-bar.

13. A mold comprising a sectional tap ered sleeve, a cross-barconnecting the sections adjacent their lower ends, a cover rotatablymounted on the upper end of the sleeve for reducing the diameter thereofand provided with openings, means passing through the openings forengaging the in- .ner face of the sections for holding them expanded,and a threaded bolt extending through the cover and cross-bar.

14;. A mold comprising a sleeve, a crossbar, right-angle extensionsformed on each end of the cross-bar and engaging the interior of thesleeve, means passing through the sleeve and right-angle extensions forsecuring the cross-bar to the sleeve, a cover rotatably mounted on theupper end of-the sleeve for reducing the diameter thereof, and athreaded bolt extending through the cover and cross-bar.

15. A mold comprising a sectional ta- M c pered sleeve, outwardlyextending projectionsvformed on the upper end of each section, a coverrotatabl mounted on the top of the sleeve anda apted to engage theprojections to reduce the {diameter of the sleeve, an offset formed onthe top of the c0ver,"a cross-bar connecting the sections of the sleeveadjacent their lower ends, a 7

threaded bolt extending through the offset on the cover and cross-bar, awasher carried by the threaded bolt and en aging the un derface of thecross-bar, an a pin extending transversely through the bolt and engagingthe under side of the washer.

- In testimony whereof I have hereunto A affixed my signature in thepresence of two

